SCOTTSDALE, Ariz. -- Angelic voices filled a Scottsdale church, in hopes that a missing angel from Tucson would be brought home safe - and soon.

The Arizona Opera Chorus held a benefit concert called "Voices of Hope", for Isabel Celis, a smiling 6 year old in pictures, who has been missing for nine days.

"I don't think you can be even in the community but around the environment in Tucson and not just feel the pain of this family," said Kathleen Ganley, the girl's great aunt.

Dozens of people attended the concert, where door attendees handed out missing persons fliers and purple ribbons.

Members of the chorus, of which Isabel's dad Sergio has been a member for the past 20 years, performed songs like "The Promise of the Living" and "This Little Light of Mine."

While benefits and fundraisers are being held for the family, Tucson police continue to work leads - 350 since the girl disappeared.

But the tips aren't coming as often and now detectives are circling around and reviewing old witness statements.

"In the early days you might interview a person and then 9 days later you might really know what the value of that statement was. So we're going back and listening to those statements. ," said Lt. Fabian Pacheco.

Police have been able to interview a few of the people in surveillance footage, captured near the Celis' home the night Isabel went missing.

Pacheco, in a press conference on Sunday, agreed with reporters that this case has the potential to go cold.

But extended family like Ganley, isn't ready to give up.

"Lt. Pacheco has been very clear that they have no reason to believe that she wouldn't be alive, that they're continuing to pursue that so I'm incredibly hopeful," Ganley said. "The message to all really is keep searching, don't give up searching and above all else, keep Isa and her family in your prayers."